To provide a control system capable of setting a various kinds of driving mode, and shifting the driving mode regardless of the rotational speed of the engine.The control system comprises: a power distribution mechanism having three rotary elements rotating differentially amongst each other; a speed change mechanism capable of setting a first speed change mode in which the power transmitted from the second rotary element connected with the first electric motor is outputted to an output member, and a second speed change mode in which the power transmitted from the third rotary element connected with the second electric motor is outputted to the output member; and a first speed change control means (steps S7 and S8), which sets an EV running mode by temporarily disabling the internal combustion engine to transmit the power thereof to the output member while transmitting the power outputted from any of the electric motors to the output member instead of transmitting the power of the internal combustion engine, in case of shifting the speed change mode of the speed change mechanism under a condition in which the power of the internal combustion engine is being transmitted to the output member without being converted into an electric power by the electric motors.